2310360214 APsystems DC Connector Polarity User Guide
- June 3, 2024
- APsystems
Table of Contents
Design Guide
APsystems DC Connector Polarity
2310360214 APsystems DC Connector Polarity
MATING APSYSTEMS MICROINVERTERS WITH PV MODULES USING DC CONNECTORS
APsystems microinverters need to mate with PV modules through the appropriate
DC connectors. Follow these guidelines to ensure correct polarity between the
microinverter and the PV module.
Make sure the positive DC output of the PV module (+) connects to the
microinverter connector labeled negative (-), which is really the electrical
positive (+) inside the microinverter.
APsystems microinverters are normally manufactured with one type of DC cable
that mate with PV modules: MC-4 compatible locking connectors.
CASE 1 : When PV modules have MC-4 compatible connectors and are directly
connected to the microinverter, those connectors automatically mate. These
connections are
straightforward and consistent.
CASE 2 : If re-termination of a module’s connectors is required, it is
critical to identify the positive output of the PV module from the markings on
the junction box. Then add the correlated MC-4 compatible connectors.
CASE 3 : When PV modules have MC-3 compatible connectors, MC-4 to MC-3
adapters are needed. The figure below illustrates the MC-4/MC-3 adapters and
the way to connect an APsystems Microinverter with MC-4 connectors to a PV
module with MC-3 connectors.
Customers may special order microinverters with the following DC cables:
- PV module connectors are assigned and supplied by the customer.
- Bare wire cables without connectors.
CASE 1: When a microinverter has the same connectors as the module,
connectors mate to each other automatically. These connections are
straightforward and consistent.
CASE 2: When a microinverter has bare wire DC cables, the customer needs
to add connectors. Make sure the microinverter cable labeled negative (-)
connects to the positive DC output of the PV module (+).
APsystems
8701 N. Mopac Expy, Ste 160, Austin, TX 78759
TEL: 844-666-7035
EMAIL: info@APsystems.com
WEB: www.APsystems.com
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Version 1.0 12/14
References
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